You'll find this helpful! ...
basically Cloud Navigation is better than their previous "Dynamic" Navigation... It essentially means that it goes out a couple times a month and grabs new map information, including traffic flow, etc. I'm betting this is done via the Cellular connection. They same connection that uses "Safety Connect". Not sure its clear if you'll have to have a subscription to Drive Connect or Safety Connect to get the updated info. I'll bet you do! everything isn't free anymore!